In a comment published in the Richmond Times-Dispatch (Virginia, US),
Arthur Chadwick writes :
"Cypripedium calceolus... doctors became interested in this perennial after
it was discovered that the orchid had medicinal uses."
see source :
http://www.timesdispatch.com/servlet/Satellite?pagename=RTD/MGArticle/RTD_BasicArticle&c=MGArticle&cid=1031783466371
Are you aware of over-collecting of that species for medicinal uses ?
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Regards,
Viateur
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